EP2949988B1 - Unité d'éclairage de véhicule et phare de véhicule - Google Patents

Unité d'éclairage de véhicule et phare de véhicule Download PDF

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Publication number
EP2949988B1
EP2949988B1 EP14743455.9A EP14743455A EP2949988B1 EP 2949988 B1 EP2949988 B1 EP 2949988B1 EP 14743455 A EP14743455 A EP 14743455A EP 2949988 B1 EP2949988 B1 EP 2949988B1
Authority
EP
European Patent Office
Prior art keywords
movable shade
sliding contact
lamp unit
vehicle
contact member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP14743455.9A
Other languages
German (de)
English (en)
Other versions
EP2949988A4 (fr
EP2949988A1 (fr
Inventor
Kazuma Mochizuki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koito Manufacturing Co Ltd
Original Assignee
Koito Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2013013405A external-priority patent/JP6147510B2/ja
Priority claimed from JP2013013406A external-priority patent/JP6153332B2/ja
Application filed by Koito Manufacturing Co Ltd filed Critical Koito Manufacturing Co Ltd
Publication of EP2949988A1 publication Critical patent/EP2949988A1/fr
Publication of EP2949988A4 publication Critical patent/EP2949988A4/fr
Application granted granted Critical
Publication of EP2949988B1 publication Critical patent/EP2949988B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • F21S41/148—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device the main emission direction of the LED being perpendicular to the optical axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/40—Cooling of lighting devices
    • F21S45/42—Forced cooling
    • F21S45/43—Forced cooling using gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
    • B60Q1/04—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
    • B60Q1/0408—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights built into the vehicle body, e.g. details concerning the mounting of the headlamps on the vehicle body
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
    • B60Q1/04—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
    • B60Q1/14—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights having dimming means
    • B60Q1/1438—Actuating means for dimming masks or screens
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/47—Attachment thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/68—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens
    • F21S41/683—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens by moving screens
    • F21S41/689—Flaps, i.e. screens pivoting around one of their edges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/40—Cooling of lighting devices
    • F21S45/42—Forced cooling
    • F21S45/43—Forced cooling using gas
    • F21S45/435—Forced cooling using gas circulating the gas within a closed system

Definitions

  • the present invention relates to a lamp unit that is mounted on a vehicle. Further, the present invention relates to a vehicle headlamp including the lamp unit.
  • a vehicle headlamp where a lamp unit including a light source or the like is disposed inside a lamp outer casing that is configured by a cover and a lamp housing.
  • a light quantity control mechanism for controlling the amount of light emitted from the light source.
  • the light quantity control mechanism includes a movable shade for changing the shielded amount of light emitted from the light source and a solenoid for actuating the movable shade (e.g., see Fig. 4 in Patent Document 1).
  • an output shaft of the solenoid disposed on the front side and the movable shade disposed on the rear of the solenoid are connected to each other by a wire-like arm (link member).
  • One end of the arm is rotatably connected to the output shaft and the other end (bent portion) thereof is slidably abutted against an engaging portion of the movable shade.
  • the arm When the output shaft of the solenoid is moved in a left-right direction, the arm is rotated and the bent portion of the arm slides on the engaging portion of the movable shade. In this way, the movable shade is pivoted about a pivot shaft extending laterally.
  • the vehicle headlamp is switched to a low beam mode where a short distance ahead of a vehicle is irradiated.
  • the vehicle headlamp is switched to a high beam mode where a long distance ahead of the vehicle is irradiated.
  • Patent Document 1 Japanese Patent Laid-Open Publication No. 2007-213938
  • the angular portions are in sliding contact with each other and therefore it is difficult to secure the smooth linkage. As a result, a decrease in the operating efficiency is caused. In this case where the operating efficiency is low, it becomes necessary to use a solenoid having a larger driving force, correspondingly. Thus, there is a problem that an increase in size of the solenoid and an increase in cost are caused.
  • a first object of the present invention is to improve the operating efficiency of the movable shade.
  • the weight balance of the movable shade becomes worse (it is difficult to place the center of the movable shade on the rotation axis) in the case of the configuration that most of the movable shade is disposed on the front side or rear side of the pivot shaft, for example.
  • the biasing force of a spring or the like that fixes the movable shade to a predetermined position.
  • a second object of the present invention is to reduce the size of the lamp unit while suppressing an increase in weight of the movable shade.
  • a first aspect that can be taken by the present invention provides a lamp unit that is mounted on a vehicle.
  • the lamp unit includes a light source; a movable shade that is capable of being pivoted about a pivot shaft and switches a shielded amount of light emitted from the light source in accordance with a pivot amount; an actuator having an output shaft that can be axially moved; a link member that is connected to the output shaft and displaced in conjunction with a movement of the output shaft; a first sliding contact member provided on the movable shade; and a second sliding contact member that is provided on the link member and abutted against the first sliding contact member, in which the movable shade is configured to be pivoted about the pivot shaft when the first sliding contact member slides on the second sliding contact member in accordance with a displacement of the link member, and in which a surface of one of the first sliding contact member and the second sliding contact member is formed as a curved surface.
  • the surface of one of the first sliding contact member and the second sliding contact member, which are in sliding contact with each other when the output shaft is moved, is configured as a curved surface. Therefore, the movable shade is smoothly interlocked with the link member. As a result, an operating efficiency of the movable shade is improved.
  • An extension direction of the pivot shaft may coincide with a movement direction of the output shaft.
  • the curved surface may be configured as a portion of a spherical surface.
  • the contact area between the first sliding contact member and the second sliding contact member in the sliding contact is small, so that the link member and the movable shade are more smoothly interlocked. As a result, the operating efficiency of the movable shade is further improved.
  • the other of the first sliding contact member and the second sliding contact member has a plane in contact with the curved surface.
  • one of the first sliding contact member and the second sliding contact member is always in point-contact with the other thereof, so that the link member and the movable shade are more smoothly interlocked. As a result, the operating efficiency of the movable shade is further improved.
  • a second aspect that can be taken by the present invention provides a headlamp that is mounted on a vehicle.
  • the headlamp includes a lamp housing having an opening in at least one side; a cover defining a lamp chamber together with the lamp housing by covering the opening; and the lamp unit according to the first aspect.
  • the headlamp includes the lamp unit in which the operating efficiency of the movable shade is improved. As a result, it is possible to provide the small-sized vehicle headlamp at low cost.
  • a third aspect that can be taken by the present invention provides a lamp unit that is mounted on a vehicle.
  • the lamp unit includes a light source; a movable shade that is capable of being pivoted about a pivot shaft and switches a shielded amount of light emitted from the light source in accordance with a pivot amount; and an actuator for pivoting the movable shade, in which one of the upper end and the lower end of the movable shade is located on the front side of the pivot shaft and the other thereof is located on the rear side of the pivot shaft.
  • the upper end and the lower end of the movable shade are located on the front and rear sides sandwiching the pivot shaft.
  • the pivot shaft is disposed between the upper end and the lower end of the movable shade. Accordingly, the good weight balance of the movable shade is ensured without additionally providing a counterweight or the like.
  • the actuator for pivoting the movable shade a small-sized actuator having a small driving force can be used. As a result, it is possible to reduce the size of the lamp unit while suppressing an increase in weight of the movable shade.
  • the upper end of the movable shade may be located on the rear side of the pivot shaft and the lower end of the movable shade may be located on the front side of the pivot shaft.
  • the lamp unit may include a support plate for supporting the pivot shaft, the support plate may include a pair of light shielding portions for shielding a portion of the light emitted from the light source, and on the rear side of the movable shade, the pair of light shielding portions may be arranged so as to be spaced apart in the extension direction of the pivot shaft.
  • a biasing spring for biasing the movable shade in one direction may be provided, and the biasing spring may be located on the rear side of the movable shade.
  • a fourth aspect that can be taken by the present invention provides a headlamp that is mounted on a vehicle.
  • the headlamp includes a lamp housing having an opening in at least one side; a cover defining a lamp chamber together with the lamp housing by covering the opening; and the lamp unit according to the third aspect.
  • the headlamp includes the small-sized lamp unit while suppressing the increase in weight of the movable shade. As a result, it is possible to provide the small-sized vehicle headlamp at low cost.
  • a vehicle headlamp 1 is mounted and arranged on both left and right ends in the front end portion of a vehicle body, respectively.
  • the vehicle headlamp 1 includes a lamp housing 2 and a cover 3 (see Fig. 1 ).
  • the lamp housing 2 has a recess that is opened to the front.
  • the cover 3 closes the opening of the lamp housing 2.
  • a lamp outer casing 4 is configured by the lamp housing 2 and the cover 3.
  • An internal space of the lamp outer casing 4 is defined as a lamp chamber 5.
  • a mounting hole 2a penetrates, back and forth, the rear end portion of the lamp housing 2.
  • a back cover 6 is mounted to the mounting hole 2a.
  • a lamp unit 7 is disposed in the lamp chamber 5.
  • the lamp unit 7 includes a lens holder 8, a projection lens 9 mounted to the front end of the lens holder 8, a reflector 10 for reflecting light, a light source unit 11 disposed below the reflector 10, and a cooling fan 12 disposed on the lower surface side of the light source unit 11.
  • the projection lens 9 is formed in a substantially hemispherical shape and mounted to the lens holder 8.
  • An inner surface of the reflector 10 is formed as a reflective surface 10a.
  • the reflector 10 is mounted on the upper surface of the light source unit 11.
  • the light source unit 11 includes a circuit board 13 and a light source 14 mounted on the upper surface of the circuit board 13.
  • a light emitting diode LED
  • a heat sink 15 is provided on the lower side of the circuit board 13 of the light source unit 11.
  • the cooling fan 12 is disposed inside of the heat sink 15.
  • a light quantity control mechanism 16 is disposed on the front side of the light source unit 11.
  • the light quantity control mechanism 16 includes a movable shade 17, a support plate 18, a pivot shaft 19, a link member 20, a solenoid 21 and a cover body 22 (see Fig. 1 and Fig. 2 ).
  • the movable shade 17 includes a light quantity control portion 23, regulation protrusions 24, 24, an inclined surface portion 25, supported portions 26, 26, and a slide portion 27.
  • the light quantity control portion 23 is formed in a substantially arc-surface shape.
  • the regulation protrusions 24, 24 protrude outwardly (laterally), respectively, from both left and right ends of the light quantity control portion 23.
  • the inclined surface portion 25 is provided continuously to the lower side of the light quantity control portion 23.
  • the supported portions 26, 26 protrude rearward, respectively, from both left and right ends of the inclined surface portion 25.
  • the slide portion 27 is provided continuously to one end in the left-right direction of the inclined surface portion 25.
  • the inclined surface portion 25 is inclined so as to be displaced to the front toward the lower side.
  • a shallow recess 25a is formed at the portion of the inclined surface portion 25 excluding both left and right ends on the front surface side.
  • the supported portions 26, 26 are formed with mounting holes 26a, 26a penetrating in the left-right direction.
  • a protrusion 28 (an example of a first sliding contact member) is provided on the rear surface of the slide portion 27 and protruded rearward.
  • the protrusion 28 is formed, for example, in a substantially hemispherical shape and a surface 28a thereof is configured as a portion of a spherical surface.
  • the shape of the surface 28a is not limited to a portion of the spherical surface. At least a portion of the surface 28a may be formed as a curved surface.
  • Bearings 29, 29 are respectively mounted to the supported portions 26, 26.
  • the bearing 29 is configured by a large-diameter portion 29a and a small-diameter portion 29b.
  • the small-diameter portion 29b is inserted into the mounting hole 26a, so that the bearing 29 is mounted to the supported portion 26.
  • the large-diameter portion 29a is disposed on the outside of the supported portion 26.
  • the support plate 18 includes a base surface portion 30 facing the front-rear direction and a mounting surface portion 31 protruding forward from the base surface portion 30.
  • the base surface portion 30 includes a light passing hole 30a and a placement hole 30b, which are formed so as to be spaced apart in the vertical direction.
  • the portion in the vicinity of the light passing hole 30a of the base surface portion 30 functions as a fixing shade for shielding a portion of light emitted from the light source 14.
  • Bearing pressing pieces 32, 32 are provided on an opening edge of the light passing hole 30a and protruded rearward. The bearing pressing pieces 32, 32 are spaced apart in the left-right direction.
  • the portions, which are respectively located on the outside of the left-right direction of the bearing pressing pieces 32, 32, are provided as light shielding portions 30c, 30c.
  • the light shielding portions 30c, 30c are arranged so as to be spaced apart in the left-right direction.
  • the support plate 18 is provided with shaft mounting portions 33, 33.
  • the shaft mounting portions 33, 33 are respectively located on the outside of the left-right direction of the bearing pressing pieces 32, 32.
  • the shaft mounting portions 33, 33 are protruded rearward.
  • the mounting surface portion 31 is protruded forward from a lower opening edge of the light passing hole 30a.
  • a support shaft 34 is provided on one end in the left-right direction of the mounting surface portion 31 and protruded downward.
  • the pivot shaft 19 is fixed to the support plate 18 in a state of being extended in the left-right direction.
  • the pivot shaft 19 is inserted into the bearings 29, 29 mounted to the movable shade 17.
  • the portion in the vicinity of both left and right ends of the pivot shaft 19 is inserted into the shaft mounting pieces 33, 33 from above.
  • the shaft mounting pieces 33, 33 are bent and crimped, so that the pivot shaft 19 is fixed to the front surface side of the support plate 18.
  • the light quantity control portion 23 is inserted through the light passing hole 30a, so that the movable shade 17 is disposed on the rear side of the support plate 18 and a lower side portion thereof is disposed on the front side of the support plate 18 (see Fig. 3 and Fig. 4 ). Accordingly, in the movable shade 17, an upper portion including an upper end is disposed on the rear side of the pivot shaft 19 and a lower portion including a lower end is disposed on the front side of the pivot shaft 19.
  • the bearings 29, 29 are in a state where the large-diameter portions 29a, 29a are respectively in contact with the bearing pressing pieces 32, 32 of the support plate 18 from the inside. As a result, the movement in the left-right direction of the movable shade 17 relative to the pivot shaft 19 is regulated.
  • the movable shade 17 can be pivoted relative to the support plate 18 with the pivot shaft 19 as a support point. In this way, the movable shade 17 can be pivoted between a first position (see Fig. 3 ) where the movable shade shields at least a portion of light emitted from the light source 14 and a second position (see Fig. 4 ) where the shielding amount of the movable shade is smaller than in the first position.
  • the first position refers to a position for forming a low-beam light distribution pattern that irradiates a short distance ahead of a vehicle.
  • the second position refers to a position for forming a high-beam light distribution pattern that irradiates a long distance ahead of the vehicle.
  • the regulation protrusions 24, 24 of the movable shade 17 are spaced rearward from the base surface portion 30 of the support plate 18.
  • a biasing spring 35 that is a twisted coil spring is mounted on an outer peripheral surface of the pivot shaft 19. Both ends of the biasing spring 35 are engaged with the rear surface of the movable shade 17 and the support plate 18, respectively. Accordingly, the movable shade 17 is biased in a direction of being pivoted toward the first position from the second position by the biasing spring 35.
  • the regulation protrusions 24, 24 are pressed against the rear surface of the base surface portion 30 by the biasing force of the biasing spring 35, so that the movable shade 17 is held in the first position.
  • the link member 20 includes a base portion 36 having a substantially triangular shape and a tabular sliding contact portion 37 (an example of a second sliding contact member) protruding laterally from the base portion 36 (see Fig. 2 ).
  • a connection shaft portion 36a is provided on the front end of the base portion 36 and protruded downward.
  • a supported hole 36b is formed on the rear end of the base portion 36 and penetrated in the vertical direction.
  • the support shaft 34 is inserted into the supported hole 36b of the link member 20 and a snap ring 38 is attached to a lower end of the support shaft 34.
  • the link member 20 is pivotably supported on the support plate 18 with the support shaft 34 as a support point.
  • a portion of the link member 20 is arranged to be inserted through the placement hole 30b and the sliding contact portion 37 is abutted against the protrusion 28 of the movable shade 17.
  • the solenoid 21 functions as an actuator for pivoting the movable shade 17.
  • the solenoid 21 includes a yoke case 39, a coil body 40 disposed inside of the yoke case 39, and an output shaft 41 movable in the left-right direction.
  • the yoke case 39 has a frame shape that is transversely long and penetrates back and forth.
  • the coil body 40 is arranged so that an axial direction thereof matches the left-right direction of the lamp unit 7.
  • the coil body 40 is supplied with drive current from a power supply circuit (not shown).
  • the output shaft 41 is extended in such a way that an axial direction thereof matches the left-right direction of the lamp unit 7. A portion of the output shaft 41 is protruded laterally from the yoke case 39. An annular connection groove 41a is formed at a portion near the leading end of the output shaft 41. The output shaft 41 can be moved in an axial direction in accordance with the supply state of the drive current to the coil body 40.
  • An upper surface portion 39a of the yoke case 39 is attached to the mounting surface portion 31 of the support plate 18 by a screw fixation or the like. In the state where the upper surface portion 39a is attached to the mounting surface portion 31, a portion of the solenoid 21 is disposed in the placement hole 30b.
  • connection shaft portion 36a is inserted into the connection groove 41a of the output shaft 41, so that the solenoid 21 is connected to the link member 20. Accordingly, when the output shaft 41 is moved in the axial direction in accordance with the supply state of the drive current to the coil body 40, the link member 20 is pivoted with the support shaft 34 as a support point and the protrusion 28 slides on the sliding contact portion 37.
  • the movable shade 17 is pivoted about the pivot shaft 19, depending on the contact position of the protrusion 28 to the sliding contact portion 37.
  • the cover body 22 is attached to the front surface side of the support plate 18 by a screw fixation or the like. As the cover body 22 is attached to the support plate 18, the solenoid 21 is covered by the cover body 22.
  • the lamp unit 7 is tiltably supported to the lamp housing 2 via an aiming adjustment mechanism (not shown). Accordingly, the lamp unit 7 is tilted in the vertical direction or the left-right direction of the vehicle headlamp 1 by the operation of the aiming adjustment mechanism, so that the optical axis adjustment (initial adjustment) of the light source 14 is performed.
  • the lamp unit 7 may be supported to the lamp housing 2 so as to be tiltable in the vertical direction of the vehicle headlamp 1, for example.
  • a leveling adjustment mechanism (not shown) is connected to the lamp unit 7.
  • the lamp unit 7 is tilted in the vertical direction of the vehicle headlamp 1 by the operation of the leveling adjustment mechanism, so that the direction of the optical axis of the light source 14 is adjusted in accordance with the weight of in-vehicle parts.
  • the lamp unit 7 may be pivoted in the left-right direction of the vehicle headlamp 1, for example.
  • a swivel mechanism (not shown) is connected to the lamp unit 7.
  • the lamp unit 7 is pivoted in the left-right direction of the vehicle headlamp 1 by the operation of the swivel mechanism, so that the direction of the optical axis is changed so as to follow a travelling direction of a vehicle.
  • the link member 20 is in a state where the sliding contact portion 37 is in a first pivot end located on the front side and the surface 28a of the protrusion 28 provided on the slide portion 27 of the movable shade 17 is abutted against the sliding contact portion 37 (see Fig. 5 and Fig. 6 ).
  • the output shaft 41 is moved in a direction of being drawn into the yoke case 39 and the link member 20 is pivoted (an example of displacement) about the support shaft 34.
  • the protrusion 28 of the movable shade 17 slides on the sliding contact portion 37 of the link member 20, depending on the link member 20.
  • the movable shade 17 is pivoted about the pivot shaft 19 against the biasing force of the biasing spring 35 from the first position to the second position (see Fig. 4 , Fig. 7 and Fig. 8 ).
  • the movable shade 17 is pivoted about the pivot shaft 19 from the second position to the first position by the biasing force of the biasing spring 35.
  • the link member 20 is pivoted in association with the pivoting of the movable shade 17.
  • the output shaft 41 is moved to the moving end in the direction protruding from the yoke case 39 (see Fig. 3 , Fig. 5 and Fig. 6 ).
  • the inclined surface portion 25 is formed with the recess 25a.
  • the formation of the recess 25a causes the light passing through the front surface side of the inclined surface portion 25 to be prevented from being unnecessarily reflected and shielded by the movable shade 17.
  • the lamp unit 7 includes the movable shade 17, the solenoid 21, and the link member 20.
  • the movable shade 17 can be pivoted about the pivot shaft 19 and switches the shielded amount of light emitted from the light source 14 in accordance with the pivot amount.
  • the solenoid 21 includes the output shaft 41 that is movable in the axial direction.
  • the link member 20 is connected to the output shaft 41 of the solenoid 21 and displaced in association with the movement of the output shaft 41.
  • the movable shade 17 is provided with the protrusion 28.
  • the link member 20 is provided with the sliding contact portion 37 that is abutted against the protrusion 28. As the protrusion 28 slides on the sliding contact portion 37 by the displacement of the link member 20, the movable shade 17 is configured to be pivoted about the pivot shaft 19.
  • the surface 28a of the protrusion 28 is configured as a curved surface.
  • the surface 28a of the protrusion 28 sliding on the sliding contact portion 37 when the output shaft 41 is moved is configured as a curved surface. Therefore, the movable shade 17 is smoothly interlocked with the displacement of the link member 20. As a result, the operating efficiency of the movable shade 17 to the solenoid 21 is improved.
  • a small-sized solenoid 21 having a small driving force can be used. Further, the reduction in size of the solenoid 21 allows the biasing spring 35 for biasing the movable shade 17 to be smaller in accordance with the driving force of the solenoid 21. Accordingly, it is possible to reduce the cost of the biasing spring 35. As a result, it is possible to provide the small-sized vehicle headlamp 1 having the small-sized lamp unit 7 at low cost.
  • the protrusion 28 is provided on the slide portion 27 of the movable shade 17.
  • the protrusion may be provided on the sliding contact portion 37 of the link member 20.
  • the protrusion 28 or the sliding contact portion 37 may be formed of the high slidability material, integrally with or separately from the movable shade 17 or the link member 20.
  • an extension direction of the pivot shaft 19 of the movable shade 17 coincides with a movement direction of the output shaft 41 of the solenoid 21 (left-right direction of the lamp unit 7). According to this configuration, it is not required to secure a moving space of the output shaft 41 in a direction (front-rear direction of the lamp unit 7) perpendicular to the extension direction of the pivot shaft 19. As a result, it is possible to reduce the size of the lamp unit 7 in the front-rear direction while improving the operating efficiency of the movable shade 17.
  • the surface 28a of the protrusion 28 is formed as a portion of the curved surface. According to this configuration, the contact area between the protrusion 28 and the sliding contact portion 37 in the sliding contact is small, so that the link member 20 and the movable shade 17 are more smoothly interlocked. As a result, the operating efficiency of the movable shade 17 is further improved.
  • the sliding contact portion 37 has a plane in contact with the surface 28a of the protrusion 28. According to this configuration, the protrusion 28 and the sliding contact portion 37 are always in point-contact with each other, so that the link member 20 and the movable shade 17 are more smoothly interlocked. As a result, the operating efficiency of the movable shade 17 is further improved.
  • an upper end of the movable shade 17 is located on the front side of the pivot shaft 19 and a lower end of the movable shade 17 is located on the rear side of the pivot shaft 19.
  • the pivot shaft 19 is disposed between the upper end and the lower end of the movable shade 17. Accordingly, the good weight balance of the movable shade is ensured without additionally providing a counterweight or the like.
  • the solenoid 21 for pivoting the movable shade 17 a small-sized solenoid having a small driving force can be used. As a result, it is possible to reduce the size of the lamp unit 7 while suppressing the increase in weight of the movable shade 17.
  • the movable shade 17 is located on the front side or rear side of the support plate 18, it is required to increase the size of the light passing hole 30a of the support plate 18 in order to secure a pivoting space of the upper end or the lower end of the movable shade 17.
  • the upper end and the lower end of the movable shade 17 move at the front and rear sides sandwiching the support plate 18 when the movable shade 17 is pivoted. Therefore, it is not necessary to form a space, at the support plate 18, for securing the pivoting space of the upper end and the lower end of the movable shade 17. As a result, the light emitted from the light source 14 can be suppressed from being leaked to the front of the support plate 18.
  • the lower end of the movable shade 17 may be located on the rear side of the pivot shaft 19 and the upper end thereof may be located on the front side of the pivot shaft 19.
  • the lamp unit 7 includes the support plate 18.
  • the support plate 18 includes a pair of light shielding portions 30c for shielding a portion of the light emitted from the light source 14.
  • the pair of light shielding portions 30c are arranged so as to be spaced apart in the extension direction (left-right direction) of the pivot shaft 19.
  • the light distribution pattern is affected when the light passes forward from both left and right ends in the lower side of the movable shade 17.
  • such light is shielded by the shielding portions 30c which are disposed on both left and right ends in the rear side of the inclined surface portion 25 of the movable shade 17.
  • the shielding portions 30c which are disposed on both left and right ends in the rear side of the inclined surface portion 25 of the movable shade 17.
  • the biasing spring 35 for biasing the movable shade 17 toward the first position is disposed on the rear side of the movable shade 17. According to this configuration, it can be avoided that the light passing through the light passing hole 30a of the support plate 18 is reflected and shielded by the biasing spring 35 or a member for supporting the biasing spring 35. As a result, it is possible to form a good light distribution pattern even while suppressing the increase in weight of the movable shade 17 and reducing the size of the lamp unit 7.
  • the vehicle headlamp 1 having the reflector 10 has been described as an example of one exemplary embodiment.
  • the present invention may be applied to a so-called direct-projection type vehicle headlamp having no reflector.
  • a suitable actuator other than the solenoid 21 can be also used, so long as the actuator can pivot the movable shade 17.
  • an actuator where a position of an output shaft is changed by a motor and a gear mechanism may be used.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Engineering (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Claims (4)

  1. Unité de lampe de véhicule (7) qui est montée sur un véhicule, l'unité de lampe (7) comprenant :
    un volet mobile (17) pouvant être amené à pivoter autour d'un axe de pivot (19) et commutant une amplitude protégée de lumière émise depuis une source lumineuse (14) en fonction de la valeur du pivot,
    un actionneur (21) comportant un axe de sortie (41) qui peut être déplacé axialement,
    un élément de liaison (20) qui est relié à l'axe de sortie (41) et déplacé conjointement avec un mouvement de l'axe de sortie (41),
    un premier élément de contact coulissant (28) disposé sur le volet mobile (17), et
    un second élément de contact coulissant (37) qui est disposé sur l'élément de liaison (20) et qui vient en butée contre le premier élément de contact coulissant (28),
    dans laquelle le volet mobile (17) est configuré pour être amené à pivoter autour de l'axe de pivot (19) lorsque le premier élément de contact coulissant (28) coulisse sur le second élément de contact coulissant (37) en fonction du déplacement de l'élément de liaison (20), et
    une surface d'un premier du premier élément de contact coulissant (28) et du second élément de contact coulissant (37) est formée en tant que surface incurvée (28a),
    caractérisée en ce que
    l'autre du premier élément de contact coulissant (28) et du second élément de contact coulissant (37) présente un plan en contact avec la surface incurvée (28a), et
    le premier élément de contact coulissant (28) et le second élément de contact coulissant (37) sont toujours en contact ponctuel l'un avec l'autre.
  2. Unité de lampe de véhicule (7) selon la revendication 1, dans laquelle la direction d'extension de l'axe de pivot (19) coïncide avec la direction de mouvement de l'axe de sortie (41).
  3. Unité de lampe de véhicule (7) selon la revendication 1 ou la revendication 2, dans laquelle la surface incurvée (28a) est configurée comme partie d'une surface sphérique.
  4. Bloc optique de véhicule (1) qui est monté sur un véhicule, le bloc optique de véhicule (1) comprenant :
    Un boîtier de lampe (2) comportant une ouverture sur au moins un côté,
    un carter (3) définissant un compartiment de lampe (5) avec le boîtier de lampe (2) en recouvrant l'ouverture, et
    l'unité de lampe de véhicule (7) conforme à l'une quelconque des revendications 1 à 3, l'unité de lampe de véhicule (7) étant disposée dans le compartiment de lampe (5) .
EP14743455.9A 2013-01-28 2014-01-27 Unité d'éclairage de véhicule et phare de véhicule Not-in-force EP2949988B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2013013405A JP6147510B2 (ja) 2013-01-28 2013-01-28 車輌用前照灯
JP2013013406A JP6153332B2 (ja) 2013-01-28 2013-01-28 車輌用前照灯
PCT/JP2014/051688 WO2014115875A1 (fr) 2013-01-28 2014-01-27 Unité d'éclairage de véhicule et phare de véhicule

Publications (3)

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EP2949988A1 EP2949988A1 (fr) 2015-12-02
EP2949988A4 EP2949988A4 (fr) 2016-11-23
EP2949988B1 true EP2949988B1 (fr) 2020-05-06

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US (1) US9528677B2 (fr)
EP (1) EP2949988B1 (fr)
CN (1) CN104956146B (fr)
WO (1) WO2014115875A1 (fr)

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Also Published As

Publication number Publication date
CN104956146B (zh) 2017-08-25
EP2949988A4 (fr) 2016-11-23
US9528677B2 (en) 2016-12-27
WO2014115875A1 (fr) 2014-07-31
EP2949988A1 (fr) 2015-12-02
CN104956146A (zh) 2015-09-30
US20150362146A1 (en) 2015-12-17

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